JP3234751B2 - Uncalibration warning method in analyzer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an uncalibration warning method in an analyzer.

[0002]

2. Description of the Related Art Conventionally, in a gas analyzer or the like, for example, with respect to the sensitivity deterioration, an error of a measured value due to the sensitivity deterioration of the gas analyzer is calibrated at regular intervals by a calculation control unit such as a computer, and the calculation is performed. If the obtained calibration coefficient is within the normal calibration range as shown in FIG.
In addition to outputting that calibration has been completed normally, the calibration coefficient is updated. If the calibration coefficient is out of the calibration range, the fact that calibration is impossible is output as "ALARM", and repair and adjustment are performed.

[0003]

However, since the sensitivity of the analysis unit is gradually degraded and the calibration coefficient is not known even if it is close to the non-calibration range, it suddenly enters the calibration impossible state. After that, it is necessary to investigate the cause and arrange replacement parts. Until repairs and adjustments are completed, there is a risk that the reliability of the measured values may be lost. Currently, the handling by the user during this time is treated as a missing (missing) measured value or a failure of the analyzer. However, in particular, in pollution control instruments, the concentration output is sent to a predetermined control department (for example, a government office) by a telemeter, and the above-mentioned missing measurement due to inability to calibrate may be a serious problem.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problem, and it has been proposed that a calibration device in an analyzer can check in advance that the analyzer is approaching a non-calibration state before the analyzer becomes incapable of calibration. It aims to provide a disability warning method.

[0005]

Means for Solving the Problems To achieve the above-mentioned object, a non-calibration warning method in the analyzer according to the present invention comprises:
Calibration coefficients computed in performing the calibration, it is within the calibration normal range, it is within the calibration impossible range, preset coefficients range such or be within the calibration normal range in the range can not afford, When the calibration coefficient is within the calibration normal range,
The calibration coefficients are updated as they are, and the calibration coefficients are
If it is within the normal range but there is no room, the calibration coefficient
It is updated as it is, and distributed to the input / output section of the analyzer.
A warning message is output to the analyzer operator, etc.
If the calibration coefficient is within the non-calibration range,
The display is made to indicate that calibration is not possible.

[0006]

[Effect] For example, the zero calibration coefficient in a gas analyzer is K
_z , as shown in FIG. Normal when −100.0 ≦ K _z ≦ 100.0, b. Calibration not possible when K _z <-200.0 or K _z > 200.0, c. −200.0 ≦ K _z <−100.0 or 100.
When 0 <K _z ≦ 200.0, a criterion is set such that the state is close to the state where calibration is impossible and caution is required.

If the zero calibration coefficient calculated by the calculation unit such as a computer in the calibration is within the range indicated by c, a signal such as "CAUTION" is output, and attention is paid to the operator of the analyzer. Prompt. By doing so, maintenance of the analyzer can be performed before the occurrence of non-calibration, and the missing time can be reduced. Since preparation for maintenance such as parts arrangement can be performed before the occurrence of the non-calibration, processing after the occurrence of the non-calibration can be performed quickly.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the drawings.

First, FIG. 2 schematically shows the configuration of a device to which the method for warning of non-calibration in the analyzer of the present invention is applied, for example, the configuration of a gas analyzer. Reference numeral 1 denotes a computer as an arithmetic unit. Reference numeral 2 denotes a signal conversion unit, which includes, for example, an AD conversion circuit and a DA conversion circuit. Reference numeral 3 denotes a gas analyzer, and its sensor output A is AD-converted in the signal converter 2,
Captured by the computer 1. Reference numeral 4 denotes an analyzer input / output unit, which receives a signal input from the outside, such as a range signal and the start of calibration, into the computer 1 via the signal conversion unit 2, and displays a range display, "ALARM", "CAUTI".
A signal such as "ON" is output. Reference numeral 5 denotes an operation / display unit provided at the front of the gas analyzer, which is provided with input keys and a concentration display unit.

Then, for example, a zero calibration coefficient in the gas analyzer is assumed to be _Kz, and a judgment reference range of the zero calibration coefficient _Kz is set as shown in FIG. 3, for example. That is, a. Normal when −100.0 ≦ K _z ≦ 100.0, b. Calibration not possible when K _z <-200.0 or K _z > 200.0, c. −200.0 ≦ K _z <−100.0 or 100.
When 0 <K _z ≦ 200.0, it is a cautionary state approaching a state where calibration is impossible.

Next, the operation of the gas analyzer will be described with reference to FIG.

The gas analyzer enters a calibration mode, and calibration is started (step S1).

[0013] Zero calibration coefficient K _z is calculated in the computer 1 (step S2).

[0014] The calculated zero calibration coefficient _Kz is equal to a. Normal range, b. Non-calibrable range, c. It is determined which of the cautionary states is approaching the state where calibration is impossible (step S3).

When the zero calibration coefficient K _z is a. If it is within the normal range, it is updated as it is (step S4), and the calibration ends (step S5).

Then, when the zero calibration coefficient _Kz is b. If it is in the non-calibration range, "ALARM" is output (step S6), and the calibration ends (step S5). In this case, repair, adjustment, and the like are performed.

The zero calibration coefficient K _z is c. If the caution is required, "CAUTION" is output (step S7), updated as it is (step S8), and the calibration ends (step S5). In this case, "CAUT
Since “ION” is output, the attention of the person who handles the gas analyzer is prompted, maintenance of the gas analyzer can be performed before the occurrence of calibration failure, and the measurement time can be shortened. Preparing for maintenance, such as arranging parts before the occurrence, enables quick processing after the occurrence of non-calibration, and further checks how close the cautionary condition is from the normal range to the non-calibrable range, thereby enabling calibration. It is also possible to predict the impossibility occurrence time.

In the above-described embodiment, the range of the zero calibration coefficient at the time of the calibration operation of the gas analyzer is determined. However, the present invention is not limited to this. Of course, the range of the coefficient may be determined.

Further, it goes without saying that the present invention can be applied not only to the above-mentioned gas analyzer, but also to other analyzers.

[0020]

As described above, the analysis device of the present invention
When the calibration is not possible,
The calibration coefficient calculated in
Condition is within the normal range or within the range that cannot be calibrated
When performing the calibration, not only that there is
Even if the calculated calibration coefficient is within the normal range,
May be in a state that cannot be calibrated
Is also displayed during calibration coefficient calculation,
The analyzer can be maintained before calibration becomes impossible
it can. And it is also possible to predict when calibration will not occur
Maintenance, such as arranging parts before calibration is impossible
Preparation can be performed, and after calibration
Process can be performed quickly and the missing time can be shortened.
Can be.

[Brief description of the drawings]

FIG. 1 is a flowchart for explaining a calibration impossible warning method in an analyzer according to the present invention.

FIG. 2 is a diagram schematically showing a configuration of an analyzer to which the method is applied.

FIG. 3 is a diagram showing an example of a criterion for determining a range of a zero calibration coefficient.

FIG. 4 is a diagram for explaining a conventional technique.

[Explanation of symbols]

 1 ... computer, 4 ... analyzer input / output unit.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01N 21/00-21/74

Claims (1)

(57) [Claims] 1. A calibration coefficient calculated at the time of performing calibration ,
The coefficient range is set in advance such as within the normal calibration range, within the non-calibrable range, or within the normal calibration range but without any margin, and the calibration coefficient is within the normal calibration range.
When the calibration coefficient is updated as it is,
If the calibration coefficient is within the normal calibration range but there is no room,
The calibration coefficient is updated as it is and the analyzer
A warning on the input / output section of the analyzer that warns the operator of the analyzer
Is output and the calibration coefficient is within the non-calibration range.
A method of warning that calibration is impossible in the analyzer , wherein a display indicating that calibration is impossible is made on the input / output unit .